bandit_exp3.h

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/*         SCIP --- Solving Constraint Integer Programs                      */
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/**@file   bandit_exp3.h
 * @ingroup INTERNALAPI
 * @brief  internal methods for Exp.3 bandit algorithm
 * @author Gregor Hendel
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_BANDIT_EXP3_H__
#define __SCIP_BANDIT_EXP3_H__
 
 
#include "blockmemshell/memory.h"
#include "scip/def.h"
#include "scip/type_bandit.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** include virtual function table for Exp.3 bandit algorithms */
SCIP_RETCODE SCIPincludeBanditvtableExp3(
   SCIP*                 scip                /**< SCIP data structure */
   );
 
/*
 * callback methods for Exp.3 bandit algorithm to create a virtual function table
 */
 
/** callback to free bandit specific data structures */
SCIP_DECL_BANDITFREE(SCIPbanditFreeExp3);
 
/** selection callback for bandit selector */
SCIP_DECL_BANDITSELECT(SCIPbanditSelectExp3);
 
/** update callback for bandit algorithm */
SCIP_DECL_BANDITUPDATE(SCIPbanditUpdateExp3);
 
/** reset callback for bandit algorithm */
SCIP_DECL_BANDITRESET(SCIPbanditResetExp3);
 
/** direct bandit creation method for the core where no SCIP pointer is available */
SCIP_RETCODE SCIPbanditCreateExp3(
   BMS_BLKMEM*           blkmem,             /**< block memory data structure */
   BMS_BUFMEM*           bufmem,             /**< buffer memory */
   SCIP_BANDITVTABLE*    vtable,             /**< virtual function table for callback functions of Exp.3 */
   SCIP_BANDIT**         exp3,               /**< pointer to store bandit algorithm */
   SCIP_Real*            priorities,         /**< nonnegative priorities for each action, or NULL if not needed */
   SCIP_Real             gammaparam,         /**< weight between uniform (gamma ~ 1) and weight driven (gamma ~ 0) probability distribution */
   SCIP_Real             beta,               /**< gain offset between 0 and 1 at every observation */
   int                   nactions,           /**< the positive number of actions for this bandit algorithm */
   unsigned int          initseed            /**< initial random seed */
   );
 
#ifdef __cplusplus
}
#endif
 
#endif